import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: LianBao
 * Date: 2024-09-10
 * Time: 15:11
 */
public class demo5 {
    //编写代码, 基于 Callable 实现 1+2+3+...+1000
    public static void main(String[] args) throws ExecutionException, InterruptedException {


        Callable<Integer> callable = new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                int sum = 0;

                for (int i = 1; i <= 1000; i++) {
                    sum += i;
                }
                return sum;
            }
        };

        FutureTask<Integer> futureTask = new FutureTask<>(callable);

        Thread t = new Thread(futureTask);

        t.start();
        t.join();
        System.out.println(futureTask.get());

    }
}
